Simon t



(No Model.)

S. T. WRAY.

, PGLISHING 0R BUFPING WHEEL. No. 275,561. Patented Apr. 10,1883.

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SIMON T. WRAY, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO WILLIAM F. SUPPLE, OF SAME PLAGE.

,POLISHING OR BUFFING WHEEL.

SPECIFICATION forming-part of Letters Patent No. 275,561, dated April 10, 1883.

Application tiled September 22, 1882. (No model.)

To all whom it may concern Be itpknown that I, SIMON T. WRAY, a citizen of the United States, residing at Buffalo, inthe county of Erie and State of New York, have invented certain new and useful Improvements in Polishing or Bufting Wheels; and I do hereby declare the following to be a f ull, clear, and exact description ofthe invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which ,form -a part of this specication.

' My invention relates more particularly to rigid polishing or buiiing wheels employed especiallyr in finishing the surfaces of metall/ic articles, whether cast or wrought. Heretofore these wheels have been constructed of wood and wood and metal combined, to which the emery or polishing material has been applied in various ways, or the wheels have been made entirely of emery or equivalent material.` The chief difculty with wheels of thisdescription is that they are liable to check or break while being rapidly revolved, often causing serious A injury to the operative in attendance.

The chief object, among others, of my invention is to overcome this difliculty; and to tgt end it consists in coistiictigbfnkgwheel of disks of stiff card-board or other equivalent material, A number of these .stiff disks are laid together with suitable adbesven'aterial` upon their contacting surfaces, and are then subjected to powgerfulnpreurg until/tlibecome practically a solid, compact paper 'wheel of sufticient rigiditfand durability for'tlepurpose required. The outer periphery ot" this rigid wheel is then shaped upoualathe tothe configuration correspondingwithtlsirface to be polished and the emery or Yotherpo'lishing material applied to such periphery.

I will now proceedcto indre particularly describe the manner in which I have carried ou my invention.

In the drawings, Figure l is a perspective view of a finished Wheel with portions broken away to show the internal construction; and Fig. 2 is a central section thereof, taken in a plane at rightangles to a diameter of the wheel.

Referring to the drawings, a a are the disks of thick stiE card-board or other equivalent material. These disks c are perforated at their centers to form, when incorporated into a wheel, the central circular opening, b, into which the spindle upon which the wheel revolves is secured. The outer peripheries of the disks da form the surface upon which the polishing` material is secured.

c represents in the drawings this polishing material, which consists of emery or other equivalent material, comminuted to the required degree.

The operation of constructing myimproved wheel is as follows: I take common stiff cardboard of considerable thickness, andv stamp therefrom the disks a a of the required size. The contacting-surfaces'of these disks are then coated with glue or other adhesive material, and placed together in a press in which a powerful pressure is applied until the adhesive material is sufficiently dry. It is obvious that the disks of card-hoard could be further secured against displacement by means of nails, staples, or bolts without departing from the spirit of my invention; but I have found in practice that any additional securing medium other than the glue or cement is practically unnecessary. The attached disks, after being removed from the press, are placed upon the spindle of a lathe, and with the proper cutting-tool the outer surface of the wheel is quickly and easily made true and of the desired shape. This surface'can be made either flat, shouldered concave, or convex to correspond with the surface to be finished or polished. A thick coating of glue is then applied to the finished surface of the Wheel and allowed to become partially dry, and the wheel is then rolled in the powdered emery until a sufficient quantity Xg: thereof adheres to the surface. This coating can be increased as desired by simply repeat-.r ing the operation just described. The wheel is then ready for use. When it becomes nec?` essary to renew the coating of emery the,pe riphery of the wheel can be quickly prepared for a new coat or layer of the emery by removing what remains upon the wheel with a buffstick or equivalent toolpressed ti gh tl y against the wheel while it is being rapidly revolved.

It will readily be seen that my improved wheel will last a long time, or until ithas been cut away nearly to its spindle in renewing its coats ot einery. Different grades ofeniery can be applied for dii'erent classes of work, and the periphery of the wheel can beqnickly and easily changed in configuration as often as desired. If either of the outer disks ot' cardboard should become uneven or ragged upon its edges, the defect can he quickly and cheaply remedied by the application ofa fresh disk.

I have found in practice that there is no danger whatever of the wheel checking or bursting7 and that its stiffness or rigidity is equal to any strain which it may he called upon to bear. It is cheaply', quickly, and easily constructed7 as easily renewed upon its polishing-surface, can be readily changed to adapt it to polish diii'erent-shaped surfaces, and can be utilized as long as there is any of the wheel left upon the spindle. The periphery of the wheel forms an excellent surface for the reception of the glue in applying the coa-tingof emery, owing to its iibrous nature, being superior iu this respect to the cloth and leather heretofore used.

I am aware that grinding and polishing tools have been made of paper-pulp combined with alumina, sand, emcry, &c., and worked and pressed into the desired shape; also, that flexible b'utlug and polishing wheels have been constructed of alternate layers of' cloth and paper, and I therefore do notlay claim to such construction; but

What I do claim is- A bul'lfing or polishing wheel composed of a number of disks ot' stift'card-board or equivalent material joined together under pressure by glue or cement and having a coating of polishing material applied directly upon its periphery by means of glue or other equivalent attaching medium7 substantially as shown and described.

In testimony whereot'I have signed my name to this specification in the presence of two subscribing witnesses.

SIMON T. WRAY.

Witnesses ALFRED LI. ltowuLL, W. T. MILLER. 

